Keith Allred's 16 inch OGS on his 1200GTO.
These comments are from Keith Allred's friend Bill McLaughlin:
"This is the
largest instrument at ARGO. Keith's scope consists of an Optical Guidance
Systems 16 inch Ritchie Cassegrain. The piggybacked scope is a mere 5
inch Astro-Physics refractor!"
Visit the ARGO site